aboutsummaryrefslogtreecommitdiff
path: root/render/pixman/renderer.c
blob: 27cde9394fcbb5acea6d981fb6622b5899bd636a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
#include <assert.h>
#include <drm_fourcc.h>
#include <pixman.h>
#include <stdlib.h>
#include <wayland-server.h>
#include <wlr/render/interface.h>
#include <wlr/util/box.h>
#include <wlr/util/log.h>

#include "render/pixman.h"
#include "types/wlr_buffer.h"

static const struct wlr_renderer_impl renderer_impl;

bool wlr_renderer_is_pixman(struct wlr_renderer *wlr_renderer) {
	return wlr_renderer->impl == &renderer_impl;
}

static struct wlr_pixman_renderer *get_renderer(
		struct wlr_renderer *wlr_renderer) {
	assert(wlr_renderer_is_pixman(wlr_renderer));
	struct wlr_pixman_renderer *renderer = wl_container_of(wlr_renderer, renderer, wlr_renderer);
	return renderer;
}

bool begin_pixman_data_ptr_access(struct wlr_buffer *wlr_buffer, pixman_image_t **image_ptr,
		uint32_t flags) {
	pixman_image_t *image = *image_ptr;

	void *data = NULL;
	uint32_t drm_format;
	size_t stride;
	if (!wlr_buffer_begin_data_ptr_access(wlr_buffer, flags,
			&data, &drm_format, &stride)) {
		return false;
	}

	// If the data pointer has changed, re-create the Pixman image. This can
	// happen if it's a client buffer and the wl_shm_pool has been resized.
	if (data != pixman_image_get_data(image)) {
		pixman_format_code_t format = get_pixman_format_from_drm(drm_format);
		assert(format != 0);

		pixman_image_t *new_image = pixman_image_create_bits_no_clear(format,
			wlr_buffer->width, wlr_buffer->height, data, stride);
		if (image == NULL) {
			wlr_buffer_end_data_ptr_access(wlr_buffer);
			return false;
		}

		pixman_image_unref(image);
		image = new_image;
	}

	*image_ptr = image;
	return true;
}

static struct wlr_pixman_buffer *get_buffer(
		struct wlr_pixman_renderer *renderer, struct wlr_buffer *wlr_buffer) {
	struct wlr_pixman_buffer *buffer;
	wl_list_for_each(buffer, &renderer->buffers, link) {
		if (buffer->buffer == wlr_buffer) {
			return buffer;
		}
	}
	return NULL;
}

static const struct wlr_texture_impl texture_impl;

bool wlr_texture_is_pixman(struct wlr_texture *texture) {
	return texture->impl == &texture_impl;
}

static struct wlr_pixman_texture *get_texture(
		struct wlr_texture *wlr_texture) {
	assert(wlr_texture_is_pixman(wlr_texture));
	struct wlr_pixman_texture *texture = wl_container_of(wlr_texture, texture, wlr_texture);
	return texture;
}

static void texture_destroy(struct wlr_texture *wlr_texture) {
	struct wlr_pixman_texture *texture = get_texture(wlr_texture);
	wl_list_remove(&texture->link);
	pixman_image_unref(texture->image);
	wlr_buffer_unlock(texture->buffer);
	free(texture->data);
	free(texture);
}

static bool texture_read_pixels(struct wlr_texture *wlr_texture,
		const struct wlr_texture_read_pixels_options *options) {
	struct wlr_pixman_texture *texture = get_texture(wlr_texture);

	struct wlr_box src;
	wlr_texture_read_pixels_options_get_src_box(options, wlr_texture, &src);

	pixman_format_code_t fmt = get_pixman_format_from_drm(options->format);
	if (fmt == 0) {
		wlr_log(WLR_ERROR, "Cannot read pixels: unsupported pixel format");
		return false;
	}

	void *p = wlr_texture_read_pixel_options_get_data(options);

	pixman_image_t *dst = pixman_image_create_bits_no_clear(fmt,
			src.width, src.height, p, options->stride);

	pixman_image_composite32(PIXMAN_OP_SRC, texture->image, NULL, dst,
			src.x, src.y, 0, 0, 0, 0, src.width, src.height);

	pixman_image_unref(dst);

	return true;
}

static uint32_t pixman_texture_preferred_read_format(struct wlr_texture *wlr_texture) {
	struct wlr_pixman_texture *texture = get_texture(wlr_texture);

	pixman_format_code_t pixman_format = pixman_image_get_format(texture->image);
	return get_drm_format_from_pixman(pixman_format);
}

static const struct wlr_texture_impl texture_impl = {
	.read_pixels = texture_read_pixels,
	.preferred_read_format = pixman_texture_preferred_read_format,
	.destroy = texture_destroy,
};

static void destroy_buffer(struct wlr_pixman_buffer *buffer) {
	wl_list_remove(&buffer->link);
	wl_list_remove(&buffer->buffer_destroy.link);

	pixman_image_unref(buffer->image);

	free(buffer);
}

static void handle_destroy_buffer(struct wl_listener *listener, void *data) {
	struct wlr_pixman_buffer *buffer =
		wl_container_of(listener, buffer, buffer_destroy);
	destroy_buffer(buffer);
}

static struct wlr_pixman_buffer *create_buffer(
		struct wlr_pixman_renderer *renderer, struct wlr_buffer *wlr_buffer) {
	struct wlr_pixman_buffer *buffer = calloc(1, sizeof(*buffer));
	if (buffer == NULL) {
		wlr_log_errno(WLR_ERROR, "Allocation failed");
		return NULL;
	}
	buffer->buffer = wlr_buffer;
	buffer->renderer = renderer;

	void *data = NULL;
	uint32_t drm_format;
	size_t stride;
	if (!wlr_buffer_begin_data_ptr_access(wlr_buffer,
			WLR_BUFFER_DATA_PTR_ACCESS_READ | WLR_BUFFER_DATA_PTR_ACCESS_WRITE,
			&data, &drm_format, &stride)) {
		wlr_log(WLR_ERROR, "Failed to get buffer data");
		goto error_buffer;
	}
	wlr_buffer_end_data_ptr_access(wlr_buffer);

	pixman_format_code_t format = get_pixman_format_from_drm(drm_format);
	if (format == 0) {
		wlr_log(WLR_ERROR, "Unsupported pixman drm format 0x%"PRIX32,
				drm_format);
		goto error_buffer;
	}

	buffer->image = pixman_image_create_bits(format, wlr_buffer->width,
			wlr_buffer->height, data, stride);
	if (!buffer->image) {
		wlr_log(WLR_ERROR, "Failed to allocate pixman image");
		goto error_buffer;
	}

	buffer->buffer_destroy.notify = handle_destroy_buffer;
	wl_signal_add(&wlr_buffer->events.destroy, &buffer->buffer_destroy);

	wl_list_insert(&renderer->buffers, &buffer->link);

	wlr_log(WLR_DEBUG, "Created pixman buffer %dx%d",
		wlr_buffer->width, wlr_buffer->height);

	return buffer;

error_buffer:
	free(buffer);
	return NULL;
}

static const uint32_t *pixman_get_shm_texture_formats(
		struct wlr_renderer *wlr_renderer, size_t *len) {
	return get_pixman_drm_formats(len);
}

static const struct wlr_drm_format_set *pixman_get_render_formats(
		struct wlr_renderer *wlr_renderer) {
	struct wlr_pixman_renderer *renderer = get_renderer(wlr_renderer);
	return &renderer->drm_formats;
}

static struct wlr_pixman_texture *pixman_texture_create(
		struct wlr_pixman_renderer *renderer, uint32_t drm_format,
		uint32_t width, uint32_t height) {
	struct wlr_pixman_texture *texture = calloc(1, sizeof(*texture));
	if (texture == NULL) {
		wlr_log_errno(WLR_ERROR, "Failed to allocate pixman texture");
		return NULL;
	}

	wlr_texture_init(&texture->wlr_texture, &renderer->wlr_renderer,
		&texture_impl, width, height);

	texture->format_info = drm_get_pixel_format_info(drm_format);
	if (!texture->format_info) {
		wlr_log(WLR_ERROR, "Unsupported drm format 0x%"PRIX32, drm_format);
		free(texture);
		return NULL;
	}

	texture->format = get_pixman_format_from_drm(drm_format);
	if (texture->format == 0) {
		wlr_log(WLR_ERROR, "Unsupported pixman drm format 0x%"PRIX32,
				drm_format);
		free(texture);
		return NULL;
	}

	wl_list_insert(&renderer->textures, &texture->link);

	return texture;
}

static struct wlr_texture *pixman_texture_from_buffer(
		struct wlr_renderer *wlr_renderer, struct wlr_buffer *buffer) {
	struct wlr_pixman_renderer *renderer = get_renderer(wlr_renderer);

	void *data = NULL;
	uint32_t drm_format;
	size_t stride;
	if (!wlr_buffer_begin_data_ptr_access(buffer, WLR_BUFFER_DATA_PTR_ACCESS_READ,
			&data, &drm_format, &stride)) {
		return NULL;
	}
	wlr_buffer_end_data_ptr_access(buffer);

	struct wlr_pixman_texture *texture = pixman_texture_create(renderer,
		drm_format, buffer->width, buffer->height);
	if (texture == NULL) {
		return NULL;
	}

	texture->image = pixman_image_create_bits_no_clear(texture->format,
		buffer->width, buffer->height, data, stride);
	if (!texture->image) {
		wlr_log(WLR_ERROR, "Failed to create pixman image");
		wl_list_remove(&texture->link);
		free(texture);
		return NULL;
	}

	texture->buffer = wlr_buffer_lock(buffer);

	return &texture->wlr_texture;
}

static void pixman_destroy(struct wlr_renderer *wlr_renderer) {
	struct wlr_pixman_renderer *renderer = get_renderer(wlr_renderer);

	struct wlr_pixman_buffer *buffer, *buffer_tmp;
	wl_list_for_each_safe(buffer, buffer_tmp, &renderer->buffers, link) {
		destroy_buffer(buffer);
	}

	struct wlr_pixman_texture *tex, *tex_tmp;
	wl_list_for_each_safe(tex, tex_tmp, &renderer->textures, link) {
		wlr_texture_destroy(&tex->wlr_texture);
	}

	wlr_drm_format_set_finish(&renderer->drm_formats);

	free(renderer);
}

static uint32_t pixman_get_render_buffer_caps(struct wlr_renderer *renderer) {
	return WLR_BUFFER_CAP_DATA_PTR;
}

static struct wlr_render_pass *pixman_begin_buffer_pass(struct wlr_renderer *wlr_renderer,
		struct wlr_buffer *wlr_buffer, const struct wlr_buffer_pass_options *options) {
	struct wlr_pixman_renderer *renderer = get_renderer(wlr_renderer);

	struct wlr_pixman_buffer *buffer = get_buffer(renderer, wlr_buffer);
	if (buffer == NULL) {
		buffer = create_buffer(renderer, wlr_buffer);
	}
	if (buffer == NULL) {
		return NULL;
	}

	struct wlr_pixman_render_pass *pass = begin_pixman_render_pass(buffer);
	if (pass == NULL) {
		return NULL;
	}
	return &pass->base;
}

static const struct wlr_renderer_impl renderer_impl = {
	.get_shm_texture_formats = pixman_get_shm_texture_formats,
	.get_render_formats = pixman_get_render_formats,
	.texture_from_buffer = pixman_texture_from_buffer,
	.destroy = pixman_destroy,
	.get_render_buffer_caps = pixman_get_render_buffer_caps,
	.begin_buffer_pass = pixman_begin_buffer_pass,
};

struct wlr_renderer *wlr_pixman_renderer_create(void) {
	struct wlr_pixman_renderer *renderer = calloc(1, sizeof(*renderer));
	if (renderer == NULL) {
		return NULL;
	}

	wlr_log(WLR_INFO, "Creating pixman renderer");
	wlr_renderer_init(&renderer->wlr_renderer, &renderer_impl);
	wl_list_init(&renderer->buffers);
	wl_list_init(&renderer->textures);

	size_t len = 0;
	const uint32_t *formats = get_pixman_drm_formats(&len);

	for (size_t i = 0; i < len; ++i) {
		wlr_drm_format_set_add(&renderer->drm_formats, formats[i],
			DRM_FORMAT_MOD_INVALID);
		wlr_drm_format_set_add(&renderer->drm_formats, formats[i],
			DRM_FORMAT_MOD_LINEAR);
	}

	return &renderer->wlr_renderer;
}

pixman_image_t *wlr_pixman_renderer_get_buffer_image(
		struct wlr_renderer *wlr_renderer, struct wlr_buffer *wlr_buffer) {
	struct wlr_pixman_renderer *renderer = get_renderer(wlr_renderer);
	struct wlr_pixman_buffer *buffer = get_buffer(renderer, wlr_buffer);
	if (!buffer) {
		buffer = create_buffer(renderer, wlr_buffer);
	}
	if (!buffer) {
		return NULL;
	}
	return buffer->image;
}

pixman_image_t *wlr_pixman_texture_get_image(struct wlr_texture *wlr_texture) {
	struct wlr_pixman_texture *texture = get_texture(wlr_texture);
	return texture->image;
}